1. The arrival of mind reading. Scientists in Germany used pattern recognition software to predict, from functional magnetic resonance imaging of people's brains, whether each person had secretly decided to add or subtract two numbers he was looking at. The computer correctly predicted the decision 71 percent of the time. The advertised application of this technology is computers that can discern and execute your will when you want them to—for example, if you're paralyzed or don't want to use a mouse. The feared application is mental surveillance.

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2. The neural alteration of morality. Six people with damage to the ventromedial prefrontal cortex were presented with moral dilemmas (e.g., would you smother a baby to prevent bad guys from finding and killing people in hiding) and were found to be two to three times more willing to kill than people without brain damage. The advertised conclusion is that such willingness to kill is objectively immoral. The feared conclusion is that if brain design determines what's moral, you can change morality by changing the brain—and once technology manipulates ethics, ethics can no longer judge technology.

Will Saletan writes about politics, science, technology, and other stuff for Slate. He’s the author of Bearing Right.

4. The discovery of vegetative consciousness. For five months after her car crash, an English patient displayed "no reproducible evidence of purposeful behavior" and was declared vegetative. Then she was asked, during an fMRI scan, to imagine playing tennis and walking through her home. The scan lit up with patterns that in healthy brains signify language, movement, and navigation. A follow-up report cited anecdotal cases in which Ambien woke brain-damaged people from prolonged unresponsiveness. The happy implication is that some people we thought were finished may be salvageable. The horrifying corollary is that until we find these people, they're buried alive in their skulls.

5. The progress of artificial intelligence. Computers completed their rout of humans at chess, as a $137 computer program beat the world chess champ in a six-game match, giving computers a 2-0-2 record (two wins, two ties) against human champs in their last four matches. Computers also improved their ability to adapt and modify themselves, as a robot demonstrated that it could recognize an injury to itself, infer how its limbs worked, and adjust its method of locomotion. However, DARPA scrapped a program to reverse-engineer the brain, leaving scientists to wonder whether the project had lost out to other priorities or had simply failed.